ssm 图书项目环境搭建
2021/12/15 23:11:39
本文主要是介绍ssm 图书项目环境搭建，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
1. 先配置数据库
CREATE DATABASE `ssmbuild`; USE `ssmbuild`; CREATE TABLE `books` ( `bookID` INT(10) NOT NULL primary key, `bookName` VARCHAR(100) NOT NULL, `bookCounts` INT(11) NOT NULL , `detail` VARCHAR(200) NOT NULL ); INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES (1,'Java',1,'从入门到放弃'), (2,'MySQL',10,'从删库到跑路'), (3,'Linux',5,'从进门到进牢');
2.java基本jar包导入
1、新建一Maven项目！
2、导入相关的pom依赖！
<!--依赖： junit 数据库驱动 连接池 servlet jsp mybatis mybatis-spring spring-->
<dependencies>
<!--Junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--数据库驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.27</version>
</dependency>
<!-- 数据库连接池 c3p0 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<!--Servlet - JSP -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!--Spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency>
</dependencies>
<!--静态资源导出问题-->
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
3.建立基本的骨架
（1）pojo 实体类层
（2）dao 数据层
（3）service 业务层
（4）controller 控制层
三大配置
1.mybatis-config的配置
-- typeAliases 起别名 在设置返回参数类型可以用当前类的类名
--mapper 映射我们实现dao接口的xml文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>
2.spring的配置
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>
3.web.xml的配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
</web-app>
=================================================
mybatis层
1.数据库配置文件database.properties
driver=com.mysql.cj.jdbc.Driver url =jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8 username=koko password=mxkmxk12567 #数据库配置文件
2.IDEA关联数据库 mysql
3.编写mybatis的核心配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!--别名，dao层方法的返回值可以为实体类的类名了-->
<typeAliases>
<package name="com.ma.pojo"/>
</typeAliases>
<!--mappers 映射dao接口的实现xml-->
<mappers>
<mapper resource="com/ma/dao/BookMapper.xml"/>
</mappers>
</configuration>
4.编写与数据库字段一一对应的实体类
懒人使用lombok插件！ （快速实现属性、方法的编写）
package com.ma.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.web.bind.annotation.PathVariable;
// 使用@Data注解可以快速实现类的属性和方法 （但没有有参函数）
@Data
// 使用@AllArgsConstructor 可以实现有参函数 （但无参函数被干掉了）
@AllArgsConstructor
// 使用@NoArgsConstructor 显示写入无参函数
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
5、编写Dao层的 Mapper接口！
package com.ma.dao;
import com.ma.pojo.Books;
import java.util.List;
public interface BookMapper {
// 增加一本书
int addBook(Books books);
// 删除一本书
int deleteBook(int id);
// 更新一本书
int updateBook(Books books);
// 查询一本书
Books queryBookById(int id);
// 查询所有书
List<Books> queryBooks();
}
6、编写接口对应的 Mapper.xml 文件。需要导入MyBatis的包；
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ma.dao.BookMapper">
<!--插入一条数据-->
<insert id="addBook" parameterType="Books">
insert into ssmbuild.books (bookID, bookName, bookCounts, detail) values(#{bookID},#{bookName},#{bookCounts},#{detail});
</insert>
<delete id="deleteBook" parameterType="int">
delete from ssmbuild.books where bookID = #{bookID}
</delete>
<update id="updateBook" parameterType="Books">
update ssmbuild.books set bookCounts = #{bookCounts} where bookID = #{bookID}
</update>
<select id="queryBookById" resultType="Books" parameterType="int">
select * from ssmbuild.books where bookID=#{bookID}
</select>
<select id="queryBooks" resultType="Books">
select * from ssmbuild.books
</select>
</mapper>
7、编写Service层的接口和实现类 （service主要调用dao层，所以service接口和dao层一样，主要通过在service 实现类中，通过set注入dao层，调用dao层的方法）
接口：
package com.ma.service;
import com.ma.pojo.Books;
import java.util.List;
public interface BookService {
// 增加一本书
int addBook(Books books);
// 删除一本书
int deleteBook(int id);
// 更新一本书
int updateBook(Books books);
// 查询一本书
Books queryBookById(int id);
// 查询所有书
List<Books> queryBooks();
}
实现类：
package com.ma.service;
import com.ma.dao.BookMapper;
import com.ma.pojo.Books;
import java.util.List;
public class BookServiceImpl implements BookService{
// 通过service去调用dao层
private BookMapper bookMapper;
// set注入
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
@Override
public int addBook(Books books) {
return bookMapper.addBook(books);
}
@Override
public int deleteBook(int id) {
return bookMapper.deleteBook(id);
}
@Override
public int updateBook(Books books) {
return bookMapper.updateBook(books);
}
@Override
public Books queryBookById(int id) {
return bookMapper.queryBookById(id);
}
@Override
public List<Books> queryBooks() {
return bookMapper.queryBooks();
}
}
=================================================
spring-dao层
我们通过spring去接管我们的mybatis层
我们在spring-dao层中做连接池，做sqlSessionFactory的工厂，把Dao接口注入到spring容器中
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--关联数据库配置文件-->
<context:property-placeholder location="classpath:database.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driver}"/>
<property name="jdbcUrl" value="${url}"/>
<property name="user" value="${username}"/>
<property name="password" value="${password}"/>
<!-- c3p0连接池的私有属性 -->
<property name="maxPoolSize" value="30"/>
<property name="minPoolSize" value="10"/>
<!-- 关闭连接后不自动commit -->
<property name="autoCommitOnClose" value="false"/>
<!-- 获取连接超时时间 -->
<property name="checkoutTimeout" value="10000"/>
<!-- 当获取连接失败重试次数 -->
<property name="acquireRetryAttempts" value="2"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入数据库连接池-->
<property name="dataSource" ref="dataSource"/>
<!--配置mybatis的全局配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注入sqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!-- 给出需要扫描Dao接口包 -->
<property name="basePackage" value="com.ma.dao"/>
</bean>
</beans>
Spring-service层
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--1.扫描service下的包-->
<context:component-scan base-package="com.ma.service"/>
<!--2.将我们的所有业务类注入到spring，可通过配置，或者注解实现-->
<bean id="BookServiceImpl" class="com.ma.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper"/>
</bean>
<!--3.声明式事务提交-->
<bean id="TransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--配置数据源-->
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
SpringMVC层
----DispatcherServlet总体接管
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--encodingFilter-->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--Session过期时间-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
spring-web.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--映射器 适配器-->
<mvc:annotation-driven/>
<!--静态资源过滤 例如css js-->
<mvc:default-servlet-handler/>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 4.扫描web相关的bean -->
<context:component-scan base-package="com.ma.controller" />
</beans>
最后Controller层编写类
package com.ma.controller;
import com.ma.pojo.Books;
import com.ma.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
@Controller
@RequestMapping("/books")
public class BookController {
// controller调service层
// 怎么调? 通过注解注入
@Autowired
@Qualifier("BookServiceImpl")
private BookService bookService;
// 查询全部书籍，并且返回一个书籍展示页面
@RequestMapping("/allbook")
private String list(Model model){
List<Books> books = bookService.queryBooks();
model.addAttribute("list",books);
return "allbook";
}
}
总结一下
1.spring-dao层主要操作数据库。 -怎么操作数据库？ ---- 通过mybatis
2.spring-service层调用dao层。 -怎么调用dao层？ ---- dao接口注入到spring service通过spring配置dao接口
3.spring-mvc 主要操作service层。
service怎么调用dao层：
spring-dao层最后的扫描dao层接口注入到spring容器中，是因为service层必须要调dao层，怎么调用dao层？就是通过set注入调用。在spring-service 把实现类注入到容器中，
通过配置，因为我们已经把dao层注入到spring容器当中了，我们可以通过ref引用获取dao层的接口赋值给service层set注入的dao，从而实现了service调用dao层
controller层怎么控制service层？
通过注解注入service与其原理和调用dao层一致
这篇关于ssm 图书项目环境搭建的文章就介绍到这儿，希望我们推荐的文章对大家有所帮助，也希望大家多多支持为之网！
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